Mud wheel for a tractor



FIG. 1 is a front elevational view of a mud wheel for a tractor showing my new design;

FIG. 2 is a top plan view thereof, the bottom view being a mirror image;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a partial sectional view thereof, taken along lines 4--4 in FIG. 3. 

The ornamental design for a mud wheel for a tractor, as shown. 